EP0872962A3 - Echo cancelling using foreground and background filters - Google Patents
Echo cancelling using foreground and background filters Download PDFInfo
- Publication number
- EP0872962A3 EP0872962A3 EP98302979A EP98302979A EP0872962A3 EP 0872962 A3 EP0872962 A3 EP 0872962A3 EP 98302979 A EP98302979 A EP 98302979A EP 98302979 A EP98302979 A EP 98302979A EP 0872962 A3 EP0872962 A3 EP 0872962A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- background
- filters
- echo
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephone Function (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI971664A FI104524B (en) | 1997-04-18 | 1997-04-18 | An echo cancellation system and method and a mobile station |
FI971664 | 1997-04-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0872962A2 EP0872962A2 (en) | 1998-10-21 |
EP0872962A3 true EP0872962A3 (en) | 2004-12-08 |
EP0872962B1 EP0872962B1 (en) | 2006-10-25 |
Family
ID=8548674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98302979A Expired - Lifetime EP0872962B1 (en) | 1997-04-18 | 1998-04-17 | Echo cancelling using foreground and background filters |
Country Status (6)
Country | Link |
---|---|
US (1) | US6163609A (en) |
EP (1) | EP0872962B1 (en) |
JP (1) | JP3679245B2 (en) |
AT (1) | ATE343874T1 (en) |
DE (1) | DE69836240T2 (en) |
FI (1) | FI104524B (en) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19935808A1 (en) * | 1999-07-29 | 2001-02-08 | Ericsson Telefon Ab L M | Echo suppression device for suppressing echoes in a transmitter / receiver unit |
US7068780B1 (en) * | 2000-08-30 | 2006-06-27 | Conexant, Inc. | Hybrid echo canceller |
US6957240B2 (en) | 2001-08-08 | 2005-10-18 | Octasic Inc. | Method and apparatus for providing an error characterization estimate of an impulse response derived using least squares |
US6999509B2 (en) | 2001-08-08 | 2006-02-14 | Octasic Inc. | Method and apparatus for generating a set of filter coefficients for a time updated adaptive filter |
US6970896B2 (en) | 2001-08-08 | 2005-11-29 | Octasic Inc. | Method and apparatus for generating a set of filter coefficients |
US6965640B2 (en) | 2001-08-08 | 2005-11-15 | Octasic Inc. | Method and apparatus for generating a set of filter coefficients providing adaptive noise reduction |
GB2389286A (en) * | 2002-05-28 | 2003-12-03 | Mitel Knowledge Corp | Echo cancellation |
US7242762B2 (en) | 2002-06-24 | 2007-07-10 | Freescale Semiconductor, Inc. | Monitoring and control of an adaptive filter in a communication system |
US7388954B2 (en) | 2002-06-24 | 2008-06-17 | Freescale Semiconductor, Inc. | Method and apparatus for tone indication |
US7215765B2 (en) | 2002-06-24 | 2007-05-08 | Freescale Semiconductor, Inc. | Method and apparatus for pure delay estimation in a communication system |
US6961423B2 (en) * | 2002-06-24 | 2005-11-01 | Freescale Semiconductor, Inc. | Method and apparatus for performing adaptive filtering |
GB2395878A (en) * | 2002-11-29 | 2004-06-02 | Mitel Knowledge Corp | Method of capturing constant echo path information using default coefficients |
US6947549B2 (en) * | 2003-02-19 | 2005-09-20 | The Hong Kong Polytechnic University | Echo canceller |
DE10329055B4 (en) * | 2003-06-27 | 2005-10-13 | Infineon Technologies Ag | Method and apparatus for echo cancellation |
US20070116255A1 (en) * | 2003-12-10 | 2007-05-24 | Koninklijke Philips Electronic, N.V. | Echo canceller having a series arrangement of adaptive filters with individual update control strategy |
US7596220B2 (en) * | 2004-12-30 | 2009-09-29 | Alcatel Lucent | Echo cancellation using adaptive IIR and FIR filters |
US7536007B2 (en) * | 2004-12-30 | 2009-05-19 | Alcatel Lucent | Echo cancellation using adaptive IIR and FIR filters |
GB2427332B (en) * | 2005-06-16 | 2007-05-16 | Trinity Convergence Inc | Systems and methods for adaptive echo cancellation |
US8335311B2 (en) * | 2005-07-28 | 2012-12-18 | Kabushiki Kaisha Toshiba | Communication apparatus capable of echo cancellation |
US8014516B2 (en) * | 2006-01-27 | 2011-09-06 | Mediatek Inc. | Method and apparatus for echo cancellation |
US8437757B2 (en) * | 2006-06-30 | 2013-05-07 | Nokia Corporation | Systems for providing peer-to-peer communications |
US8170224B2 (en) * | 2008-09-22 | 2012-05-01 | Magor Communications Corporation | Wideband speakerphone |
JP5373473B2 (en) * | 2009-05-11 | 2013-12-18 | 株式会社エー・アール・アイ | Voice extraction device |
SE533956C2 (en) * | 2009-07-20 | 2011-03-15 | Limes Audio Ab | Device and method for controlling residual cushioning |
EP2512040B1 (en) * | 2011-04-14 | 2013-11-13 | Alcatel Lucent | A computation saving echo canceller for a wide band audio signal |
US9479650B1 (en) | 2015-05-04 | 2016-10-25 | Captioncall, Llc | Methods and devices for updating filter coefficients during echo cancellation |
KR102266780B1 (en) * | 2019-07-04 | 2021-06-18 | 한양대학교 산학협력단 | Method and apparatus for reducing speech distortion by mitigating clipping phenomenon and using correlation between microphone input signal, error signal, and far end signal occurring in a voice communication environment |
US20230051021A1 (en) * | 2021-08-04 | 2023-02-16 | Nokia Technologies Oy | Apparatus, Methods and Computer Programs for Performing Acoustic Echo Cancellation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4757527A (en) * | 1984-09-12 | 1988-07-12 | Plessey Overseas Limited | Echo canceller |
US5307405A (en) * | 1992-09-25 | 1994-04-26 | Qualcomm Incorporated | Network echo canceller |
US5463618A (en) * | 1993-05-28 | 1995-10-31 | Matsushita Electric Industrial Co., Ltd. | Echo canceller |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU4695485A (en) * | 1984-09-21 | 1986-03-27 | Alcatel N.V. | Digital hybrid |
FI108830B (en) * | 1993-12-23 | 2002-03-28 | Nokia Corp | Method and apparatus for echo suppression in a telephone apparatus |
US5664011A (en) * | 1995-08-25 | 1997-09-02 | Lucent Technologies Inc. | Echo canceller with adaptive and non-adaptive filters |
SE505150C3 (en) * | 1995-10-18 | 1997-08-04 | Ericsson Telefon Ab L M | Adaptive dual filter echo leakage procedure |
-
1997
- 1997-04-18 FI FI971664A patent/FI104524B/en not_active IP Right Cessation
-
1998
- 1998-04-16 US US09/061,623 patent/US6163609A/en not_active Expired - Lifetime
- 1998-04-17 AT AT98302979T patent/ATE343874T1/en not_active IP Right Cessation
- 1998-04-17 EP EP98302979A patent/EP0872962B1/en not_active Expired - Lifetime
- 1998-04-17 DE DE69836240T patent/DE69836240T2/en not_active Expired - Lifetime
- 1998-04-20 JP JP10988198A patent/JP3679245B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4757527A (en) * | 1984-09-12 | 1988-07-12 | Plessey Overseas Limited | Echo canceller |
US5307405A (en) * | 1992-09-25 | 1994-04-26 | Qualcomm Incorporated | Network echo canceller |
US5463618A (en) * | 1993-05-28 | 1995-10-31 | Matsushita Electric Industrial Co., Ltd. | Echo canceller |
Non-Patent Citations (1)
Title |
---|
KUO S M ET AL: "A real-time acoustic echo cancellation system", IEEE INTERNATIONAL CONFERENCE ON SYSTEMS ENGINEERING, 9 August 1990 (1990-08-09), pages 168 - 171, XP010006436 * |
Also Published As
Publication number | Publication date |
---|---|
FI104524B (en) | 2000-02-15 |
US6163609A (en) | 2000-12-19 |
EP0872962B1 (en) | 2006-10-25 |
EP0872962A2 (en) | 1998-10-21 |
FI971664A0 (en) | 1997-04-18 |
FI971664A (en) | 1998-10-19 |
ATE343874T1 (en) | 2006-11-15 |
DE69836240D1 (en) | 2006-12-07 |
JP3679245B2 (en) | 2005-08-03 |
JPH10341190A (en) | 1998-12-22 |
DE69836240T2 (en) | 2007-02-08 |
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